Page corner mark for books



ilnited States Patent 6 2,853,043 PAGE CORNER MARK FOR BOOKS Marie L.Bitterman and John W. Taylor, Dallas, Tex.

Application March 5, 1956, Serial No. 569,550

1 Claim. (Cl. 116-119) Our invention relates broadly to book marks andmore particularly to a page corner mark for books.

One of the objects of our invention is'to provide a convenient pagecorner mark for books which may be readily manufactured on a massproduction scale at low cost.

Another object of our invention is to provide a construction of pagecorner mark for books which may be die-pressed from paper sheet materialand creased in triangular sections which may be readily folded insuperimposed relation and coupled together to provide both a protectorand marker for the pages of a book.

Another object of our invention is to provide a construction of pagecorner mark for books including a pair of substantiallytriangularly-shaped portions of equal areas and a third substantiallytriangular portion of approximately one half the area of either of theaforesaid triangularly-shaped portions and foldable into superimposedrelation therewith and guided in position by an arrangement of tongueand coacting slits by-which the marking device may be maintainedsubstantially coplanar with a selected page of a book.

Other and further objects of our invention reside in the shaping of thecoacting parts of a page corner mark for books to facilitate the guidingand maintenance of the parts in superimposed relation as a cornerprotector and marker for a selected page of a book as set forth morefully in the specification hereinafter following by reference to theaccompanying drawings, in which:

Fig. 1 shows a fragmentary portion of a flat blank sheet from which thedevice of our invention is diepressed;

Fig. 2 is a fragmentary vertical sectional view taken on line 2-2 ofFig. 1;

Fig. 3 is a transverse sectional view through the device of ourinvention after it is severed from the sheet shown in Fig. 1, the viewbeing taken on line 33 of Fig. 4-;

Fig. 4 is a plan view of the device of our invention severed from thesheet of Fig. 1;

Fig. 5 is a rear view of the device of our invention with parts foldedto superimposed position and guided into coupled relationship;

Fig. 6 is a view similar to the view shown in Fig. 5, but looking at thedevice from the front thereof;

Fig. 7 is a transverse sectional view through the device with the partsshown in superimposed relation, the view being taken on line 7-7 of Fig.5;

Fig. 8 is a perspective view showing the parts of the device beingfolded into superimposed relation;

Fig. 9 is a perspective view of the device with the parts in. foldedsuperimposed relation; and

Fig. 10 is a front view of a book showing the page corner mark inposition on a selected page thereof.

Our invention is directed to a device which can be readily die-pressedfrom sheet cardboard, paper, fiber, metal foil or thin fabric sheetmaterial with scorings pressed therein to facilitate the folding of theparts into "ice superimposed relation to form a corner protector andmark for a selected page or pages of a book.

The device of our invention may be produced inexpensively on a massproduction scale and is formed by a pair of adjacent substantiallytriangularly-shaped areas to one of which there is integrally connectedan adjacent triangularly-shaped area which is one half the area ofeither of the two aforesaid. triangularly-shaped areas. The smallertriangularly-shaped area is provided with a peripheral edge which isrecessed. This recess includes a pair of spaced parallelly disposedslits which extend in a direction normal to the direction of theperipheral edge of the triangularly-shaped portion of smaller area. Atongue is disposed between these slits and projects through theperipheral recess for a distance terminating in alignment with theperipheral edge of the said triangularly-shaped portion of smaller area.One of the two triangularly-shaped portions of larger area is providedwith an opening therein so located that when the triangularly-shapedportions are folded into superimposed relation the tongue on thetriangularly-shaped portion of smaller area may be inserted through theopening in the triangularly-shaped portion of larger area for guidingand maintaining the several triangularly-shaped portions in superimposedrelation to fit over and protect the corner of a page of a book.

The device has been found particularly efiective as it presents a flatplane surface for the display of advertising matter, enabling the deviceto be used as a give-away gift by advertisers.

Referring to the drawings in more detail, reference character 1designates a fiat sheet of material from which the device of ourinvention is die-pressed, along the contour line indicated at 2,constituted by two substantially t-riangularly-shaped portions ofsubstantially equal area and a third substantially triangularly-shapedportion of approximately one half the area of either of the aforesaidareas. The'device of ourinvention, when severed along the contouroutline 2 from the fiat sheet material 1, is shown at 3 in Fig. 4. Thedevice 3 is scoredv along the lines 4 and 5 at the same time that it issevered from the sheet material 1. The scoring lines 4 and 5 extendbetween the triangularly-shaped portions comprising the foldablesections of the device 3 where the triangularly-shaped portions ofsubstantially equal area are represented at 6 and 8, separated by thescoring line 5, while the substantially triangularly-shaped portion 9,which is approximately one half the area of either of the substantiallytriangularly-shaped portions 6 and 8, is separated from thesubstantially triangularlyshaped portion 6 by scoring 4. Thesubstantially triangularly-shaped portion 6 forms the front of thedevice of our invention and is disposed centrally with respect to thesubstantially triangularly-shaped portion 8 and the substantiallytriangularly-shaped portion 9. A thumb opening is provided in theperipheral edge of the central substantially triangularly-shapedportion6 for convenience in slipping the device over the corner of a page.

The substantially triangularly-shaped portion 9 of smaller area islocated to the left of the central substantially triangularly-shapedportion 6, while the substantially triangularlyeshaped portion 8 of anarea substantially equal to the area of the substantiallytriangularlyshaped portion 6 is located to the right of the centralportion 6 and these parts fold toward each other with the apices thereofaligned in forming the device. The substantially triangularly-shapedportion 9 is shaped'on the peripheral edge thereof which extendsparallel to the front edge of the central portion 6 to provide a recess10 having inwardly inclined edges which extend to spaced slits 11 and12. The spaced slits 11 and 12 extend substantially parallel to eachother in a direction normal to the top peripheral edge of thesubstantially triangularly-shaped portion 9. A tongue or lug 14 isdisposed between the slots 11 and 12 in the peripheral edge of portion 9which connects with the apices of the triangularly-shaped portions 6 and8 and terminates in a rounded end in a position aligned with the topperipheral edge of the substantially triangularly-shaped portion 9.

The substantially triangularly-shaped portion 8 contains an openingtherein which has the form of a T, including a rorizontally extendinglineal slit 15 and a vertically extending lineal slit 16 when the blankis viewed as in Figs. 1 and 4. The horizontally extending lineal slit 15is disposed in spaced parallel relationship to the top peripheral edgeof triangularly-shaped portion 9 that extends from the apices oftriangularly-shaped portions 6 and 8. When the left hand substantiallytriangularlyshaped portion 9 is folded along scoring 4 over the centralsubstantially triangularly-shaped portion 6 and when the right handsubstantially triangularly-shaped portion 8 is folded upon scoring inthe direction of the left hand substantially triangularly-shaped portion9 the tongue 14 is aligned with the lineal slit 15 of the T-shapedopening in the substantially triangularly-shaped portion 8, asrepresented in Fig. 8. This enables the tongue 14 to be readily slippedthrough the slit 15 as represented in Fig. 9, and the parts thus guidedand maintained in superimposed relation. The tongue 14 when insertedthrough the slit 1S occupies a position intermediate the centralsubstantially triangularly-shaped portion 6 and the substantiallytriangularly-shaped portion 8, as shown more clearly in thecross-sectional view illustrated in Fig. 7 and is substantially coplanartherewith.

The device thus folded is readily slipped into position on the corner ofa page of a book as illustrated in Fig. 10. The device serves as amarker and also as a medium for displaying advertising which is printedupon the flat plane surface 6. The device may encompass a single page orseveral pages and is readily removable and re-insertable. The device isso flat and thin that it does not appreciably bulge the pages of a bookto which it is applied, when the book is closed. Glue or other adhesivewhich might stick to the pages of the book are not required when usingthe device of our invention.

We have found the device of our invention highly prao tical andsuccessful in use and although we have disclosed the invention incertain preferred embodiments we realize that certain modifications maybe made and we desire that it be understood that no limitations upon ourinvention are intended other than may be imposed by the scope of theappended claim.

What we claim as new and desire to secure by Letters Patent of theUnited States is as follows:

A page corner mark for books comprising a flat sheet of material formedfrom three substantially triangularlyshaped contiguous portions, one ofsaid portions being disposed centrally between the other two portionsand separated therefrom by scorings extending to an apex, thesubstantially triangularly-shaped portion at the right of said centralsubstantially triangularly-shaped portion being foldable to superimposedposition over said central substantially triangularly-shaped portion andhaving an area substantially equal to the area of said centralsubstantially triangularly-shaped portion and the substantiallytriangularly-shaped portion at the left of said central substantiallytriangularly-shaped portion having an area approximately one-half thearea of either of the superimposed substantially triangularly-shapedportions and being foldable into superimposed relation to the apices ofsaid folded substantially triangularly-shaped portions, saidtriangularly-shaped portion of smaller area being slitted alongsubstantially parallel lines extending substantially normal to theperipheral edge thereof adjacent the apices of said folded portions toform a tongue and said substantially triangularly-shaped portion overwhich said last mentioned substantially triangularly-shaped portion ofsmaller area is superimposed having a T-shaped slit therein aligned withthe position of said tongue through which said tongue is insertable andreversible as a hook whereby the superimposed substantiallytriangularlyshaped portions are maintained in aligned relation with saidtongue extending substantially coplanar with said two superimposedsubstantially triangularly-shaped folded portions.

References Cited in the file of this patent UNITED STATES PATENTS

